I have been using the M Square OR2800 for 12 years. Twice, nearby lightening strikes have induced enough energy to weld the reed switch contacts. Otherwise this is a great rotator in my opinion. A re
If you are satisfied with the strength of the present manual winch it is relatively simple to adapt it to use a heavy duty variable speed drill connected to the crank shaft and much simpler than inst
I am 80 years old, weigh 139 pounds and had no problem putting new cables and pulley bearings on my TX472 by myself. It was all done from a extension ladder beside the tower. When my tower is extende
If you are thinking about electrical effects what is your concern?That the Hytower will affect your Yagi or that the tower will affect the Hytower. The Hytower is vertically polarized on all bands. O
ARRL tested and reported the results for a number of available tuners. They tested them 160-10meters with various loads. I remember that all were very inefficient with low impedance loads on the low
The 3rd edition of ON4UN's Low band DXing shows on pages 11-78 and 11-79 4 square antennas supported by a single tower in the middle which supports higher band Yagis. In fact, I believe in 15-4 under
I agree with Denny on both points. The SWR bandwidth you see is wider than one would expect and is probably indicative of excessive loss in the antenna or radial system. One of our local contesters K
I use small RG 142 teflon coax for ferrite line chokes. RF Parts has 30 ft cables under pre assembled coax for $35, by far the least expensive I have found. These have type N connectors on both ends.
Tony your antenna sounds like one of the 43 foot "160thru 10 meter " jobs. I have put together a discussion of that antenna on our club web page www.sdxa.org If you click DX Tips on the right side yo
I measure the ID of the corner tube where I want to attach something then buy 2 ea 12 inch pieces of all thread rod to slip inside. I buy 2 nuts for each rod. Clamp the nuts onto a drilled piece of b
Doug: Quite a few people have solved that problem as follows. 1. Install a high quality WORM DRIVE manual winch. 2. Remove the handle and drive the shaft with a husky, variable speed, reversible dril
Some Andrews heliax has a ridge on the copper shield which spirals as it advances while other Heliax has concentric ridges and they need different connectors. 73, Dan, N5AR __________________________
The baluns(line chokes) are available from DX Engineering or BalunDesigns mounted in weatherproof boxes. I have measured both and they are very good. They are very easy to build if you want to go tha
I point into the wind. The wind force is balanced . This helps prevent the rotational forces caused by surging winds which can cause rotator damage or loosening of clamps. 73, Dan, N5AR _____________
I have a much more complete discussion of this topic on our clubs web page at www.sdxa.org. You can see it under articals. 73, Dan, N5AR _______________________________________________ ______________
If you are an antenna fan you are probably aware of the work done by G0KSC to design yagi antennas having exceptionally low radiation off the rear and wide bandwidth. These are described on his web p
Dan: You can go to www.sdxa.org and click articles to see my article on how I replaced the lift cable on my TX472 with it in a vertical position. It works for any of the cables on the tower. 73, Dan,
When my 131 ft UST crankup arrived it had a 2 7/8 chrome moly mast with a nice top bearing. The bearing has a zerk fitting and I was concerned that water would stand in the top of the bearing. In ord
Mark: If you would like to read a discussion of the good and bad points of the 43 ft vertical go to www.sdxa.org and click on "articals". The VK link actually puts numbers on the efficiency on variou